Developer Tools
Free developer utilities: JSON, XML, and SQL formatters, JWT and URL parsers, cron and chmod helpers, docker-run converters, and more — all private, all in your browser.
URL Encoder & Decoder Online — Free Percent-encode text for safe use in URLs or decode escaped URL components back to readable text. Free, instant, and fully in-browser. HTML Entity Encoder & Decoder — Free Escape HTML special characters or decode named, decimal, and hexadecimal entities back to text. Free, private, and browser-based. URL Parser & Query String Inspector — Free Break a URL into protocol, credentials, host, port, path, query parameters, hash, and origin. Free, standards-based, and in-browser. HTTP Basic Auth Header Generator — Free Generate a complete HTTP Basic Authorization header from a username and password, with Unicode-safe base64 encoding in your browser. Meta Tag & Open Graph Generator — Free Generate escaped HTML title, description, Open Graph, and Twitter Card tags from page details. Free and generated in your browser. MIME Type & File Extension Lookup — Free Find MIME types from file extensions or search registered media types for extensions, charset, and content-type details. Free and instant. JWT Decoder & Parser Online — Free Decode JWT header and payload JSON plus the raw signature section without uploading the token. Free, private, and browser-only. String Slug Generator Online — Free Turn titles and phrases into clean lowercase URL slugs with transliteration, word separation, and punctuation removal. Free and instant. User-Agent Parser Online — Free Parse a browser User-Agent string into browser, version, rendering engine, operating system, device, and CPU details in-browser. HTTP Status Codes Reference — Free Search standard HTTP response codes by number, reason phrase, or category, including WebDAV and modern extension statuses. Free reference. Outlook Safe Links URL Decoder — Free Extract the original destination URL from a Microsoft Outlook Safe Links protection URL. Free, validated, and decoded in your browser. Git Command Cheat Sheet — Free Search practical Git commands for setup, changes, history, branches, remotes, stashes, tags, and debugging. Free copy-ready reference. Random TCP/UDP Port Generator — Free Generate a cryptographically random port within custom bounds from 0 to 65535, defaulting to the non-privileged range. Free and local. Cron Expression Validator & Explainer — Free Validate five-field cron expressions and translate schedules into readable English using 24-hour time. Free, instant, and in-browser. JSON Minifier Online — Free Remove whitespace and comments from JSON or JSON5 input to produce compact valid JSON. Free, validated, and processed in your browser. SQL Formatter & Prettifier Online — Free Format SQL with uppercase keywords and readable indentation across MySQL, PostgreSQL, SQLite, BigQuery, T-SQL, and more dialects. XML Formatter & Beautifier Online — Free Format compact XML with configurable indentation while preserving text content and validating document structure. Free and in-browser. Chmod Permissions Calculator — Free Convert Unix read, write, and execute checkboxes into octal and symbolic permissions, or enter octal to update the matrix. Free and live. Docker Run to Compose Converter — Free Convert a docker run command into Docker Compose YAML, including ports, volumes, environment variables, names, and common flags. Email Address Normalizer Online — Free Normalize email addresses one per line for consistent comparison, including provider-specific casing, dots, and aliases. Free and private. Regular Expression Cheat Sheet — Free Search regex syntax for character classes, anchors, quantifiers, groups, lookarounds, backreferences, and flags. Free copy-ready guide. Browser & Device Information — Free Inspect screen, window, orientation, pixel ratio, languages, platform, CPU cores, online status, and User-Agent data from your browser. Keyboard Keycode Event Inspector — Free Press any keyboard key to inspect its key, code, legacy keyCode, location, and active modifier keys. Free and entirely browser-based. TOTP Code Generator & Validator — Free Generate current, previous, and next TOTP codes from a base32 secret, verify tokens, and scan an authenticator QR code. Browser-only. HTML WYSIWYG Editor Online — Free Edit rich text with headings, lists, bold, italic, code, quotes, undo, and redo while viewing and copying the generated HTML source. JSON Diff & Object Comparison — Free Compare two JSON or JSON5 values and list every added, removed, or changed path with before-and-after values. Free and in-browser. Regex Tester, Matcher & Diagram — Free Test JavaScript regular expressions with flags, captures, named groups, match indices, generated examples, and a lazy-loaded SVG diagram. JSON Tree Viewer Online — Free Parse JSON5 input and explore nested objects and arrays in a collapsible tree, with optional recursive key sorting. Free and private. YAML Tree Viewer Online — Free Parse YAML and explore maps, sequences, and scalar values in a collapsible browser tree, with optional recursive key sorting. Website Screenshot Tool — Full Page PNG Online — Free Capture full-page website screenshots online for free. Enter any public URL, pick a viewport, and download a crisp PNG rendered by our headless browser. URL to Image Converter — Turn Any Web Page into a PNG — Free Turn any public URL into a PNG image online for free. One field, one click — the rendered page image is ready in seconds and nothing is stored past an hour.